/* 供应链金融博客样式 - 蓝橙商业配色 */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #f97316;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --surface-hover: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #f97316 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--background-color); color: var(--text-primary); line-height: 1.7; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.navbar { position: fixed; top: 0; left: 0; right: 0; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-color); z-index: 1000; padding: 16px 0; }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.nav-logo { font-size: 1.5rem; font-weight: 700; background: var(--accent-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; text-decoration: none; display: flex; align-items: center; gap: 8px; }
.logo-icon { font-size: 1.8rem; }
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: var(--primary-color); }

.hero { padding: 160px 0 80px; text-align: center; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%); animation: pulse 15s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { transform: scale(1); opacity: 0.5; } 50% { transform: scale(1.1); opacity: 0.8; } }
.hero h1 { font-size: 3rem; font-weight: 800; margin-bottom: 20px; background: var(--accent-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; position: relative; }
.hero p { font-size: 1.2rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; position: relative; }

.categories-section { padding: 40px 0; }
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.category-card { background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 12px; padding: 24px; text-decoration: none; transition: all 0.3s; display: flex; flex-direction: column; align-items: center; text-align: center; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.category-card:hover { transform: translateY(-4px); border-color: var(--primary-color); box-shadow: 0 10px 30px rgba(59, 130, 246, 0.15); }
.category-icon { font-size: 2.5rem; margin-bottom: 12px; }
.category-name { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.category-count { font-size: 0.9rem; color: var(--text-muted); }

.articles-section { padding: 40px 0; }
.section-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 30px; color: var(--text-primary); }
.section-title::after { content: ''; position: absolute; bottom: -8px; left: 0; width: 50px; height: 3px; background: var(--accent-gradient); border-radius: 2px; }
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.article-card { background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden; transition: all 0.3s; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.article-card:hover { transform: translateY(-4px); border-color: var(--primary-color); box-shadow: 0 10px 30px rgba(59, 130, 246, 0.15); }
.article-content { padding: 20px; }
.category-tag { font-size: 0.85rem; color: var(--secondary-color); font-weight: 500; margin-bottom: 8px; display: block; }
.article-content h2 a { color: var(--text-primary); text-decoration: none; font-size: 1.2rem; }
.article-content h2 a:hover { color: var(--primary-color); }
.article-content p { color: var(--text-secondary); margin: 12px 0; font-size: 0.95rem; }
.meta { color: var(--text-muted); font-size: 0.85rem; }

.links-section { padding: 40px 0; background: var(--surface-color); border-top: 1px solid var(--border-color); }
.links-section h3 { text-align: center; margin-bottom: 30px; font-size: 1.5rem; color: var(--text-primary); }
.links-grid { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.links-grid a { padding: 8px 16px; background: var(--background-color); border: 1px solid var(--border-color); border-radius: 8px; color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; transition: all 0.3s; }
.links-grid a:hover { border-color: var(--primary-color); color: var(--primary-color); }

.footer { padding: 40px 0; background: var(--surface-color); border-top: 1px solid var(--border-color); }
.footer-container { text-align: center; }
.footer p { color: var(--text-muted); }

@media (max-width: 768px) { .hero h1 { font-size: 2rem; } .hero p { font-size: 1rem; } .nav-links { display: none; } .categories-grid, .articles-grid { grid-template-columns: 1fr; } }